Surfacing device for tracing-cloth.



H. L M. GOLDBEJRGYE-R.- SURFACING DEVICE FOR TRACINGCLQTH. APPLICATION FILED NOV. 2T. 1914.

1,211,932. Patented Jan. 9, 1917.

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rnvrri v I HENRY GOLDBEBGER'AND MORRIS GOLDBERGER, OF CHICAGO, ILLNOIS.

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Specification of Letters Patent.

Patented Jan. 9, 1917.

Application led November 27, 1914. Serial No. 874,187.

To all whom t may concern:

VBe it known that we, HENRY GOLDBERGER and Monrrs GQLDBERGER, citizens of 'the United States, and residents of Chicago, in the county ofCook and State of illinois, have invented certain new and useful 1mprovements in Surfacing Devices for Tracing-Cloth; and we do hereby declare that the following is a full, clear, and exact description thereof, reference beinghad to the accompanying drawings, and to the characters of reference markedfthereon, which form a part of this specification.

This invention relates to a novel device for use by draftsmen for preparing the surface of tracing cloth to receive ink, which preparation consists of the application to the surface of the cloth of a powder such as prepared chalk and the like in a manner to smooth the surface of the cloth and to clean it of grease and moisture clinging thereto and thus prepare the surface to readily receive the ink. Y e

The Vpurpose of the invention is to provide in a single unitary device a holder or receptacle for the powder having a closable opening or openings through which'the powder may be sifted on the tracing cloth and formed also to constitute a hand piece provided at one side with a yielding fiat pad, such as felt or like abrasive material, which is adapted to be rubbed over a layer' of powder sprinkled on the cloth to prepare the surface to receive the ink.

Heretofore it has been .a common .practice in applying such powder to the tracing cloth to rubV the powder over and into the surface of the cloth by the heel of the hand, a rag or the like. A practical objection to this mode of applying the powder to the cloth is that the powder is not uniformly spread over or applied to the surface thereof, leaving portions of the glazed surface unprepared. For this reason the ink lines take better in Vsome parts of the prepared surface than others, whereby said ink lines Our improved device overcomes this defect in the application of the powder to the cloth and also provides a device by which the treating of the surface of the cloth in the manner described is facilitated and the time required'therefor is shortened as compared with prior practice.

vWe have shown in the drawings a preferred embodiment of our invention, but .it

will be understood that the invention is capable of embodiment in 'other specific forms, and ther invention is not limited, therefore, tov the structure shown in the drawings, except as hereinafter specifically claimed, and as imposed by the prior art.

In the drawings, Figure 1 is a side eleva- Y tion of ar tracing cloth surfacing device embodying our invention, with parts broken. away. Fig. :Z'is an end elevation thereof. Fig. 3 is a partial' section on the line 3 3 Y of Fig. 2. Fig. a is a similar section, showing the device in position to sift the surfacing powder on the cloth.

As Vshown in the drawings, 10 designates the holder, as a whole. lt is hollow and yis shaped to constitute an elongated hollow re-V ceptacle forfthe powder. Conveniently, it

may assume the gene-ral form and vpropor-V tions of a black-board eraser, the topof'the holder body being centrally depressed and Y the side edges of the to-p portion being rounded or ribbedso as to enable the device to be readily'grasped bythe hand of the user. The holder is Yshown as made of wood, but may be made of any other suitable material. vided with a. rubbing layer or facing mein-V The lower side of the frame is prober 12, which may be made of felt or like abrasive, relatively compact rubbing material and may be cemented to the holder,

lfiody, and said layer has a flat lower surace.

Extending across one open end of the holder 11 is a platela which is attached to the end of the holder body in any suitable manner, as by the nails 15. The said plate 14 is providedr with a plurality of apertures 16 which constitute openings through which the powder may be sifted upon the cloth to be treated. The said apertures are adapted to be normally closed by a closure plate 17 applied over and fittedA flat upon the plate 14. The closure pla-teris provided with a plurality of apertures 18 that are adapted,

by relative movement of the plates 17 and 14:, to be brought into register with the Vapertures 16 of the plate 14 so that in one position thereof the powder may besifted through the end plates, and in another posi- 'tion the imperforate parts of the outer p lip or flange 25 formed on or'earried by the lower edge of the fixed plate 14. As herein sho-wn and preferably, the end plate 14 and 1" the closure Plate 17 kmade entfely of sheet metal by a suitable swaging operation. 15 j The closure plate is adapted to be depressed by means of a thumb piece 26 which is formed on or is carried by the upper edge Y thereof and is preferably turned backwardly over the upper side of the holder so as to 1 20 bewithin easy access of the thumb of the user of the device when grasping the holder yinajnatural 'manner' to operate the same.

In order.' that theY shiftable closure plate may be arrested in position' to bring the V apertures thereof'in complete register, suitable interacting stops are provided on said plates which may consist of the` Contact of `the lower margin of the; closureplate with l thelip 25.,.of the fixed plate.

VVshiftalole-Vclosure, is provided with a cover plate 27` which maybe movable ror removv ably connectedito the holder in any suitable mannerso-that when removed or shifted the fsholder,v or 4receptacle may beV charged and Qwhen in'place servesto prevent the escape of i powder. f i

` In using the devicethe holder is grasped ,in much the same manner asi a crayon eraser 40 for black-board use. Inorder'to release the powder from the holder the thumb is pressed downwardly upon the thumbV piece 26 to v shift the closure plate to bring the apertures 3 thereof into register with those of the plate i Coiiiesof this patent may be obtained fior The end of the holder, opposite to the 14, whereupon the V*powder may be sifted on the tracing cloth in the manner indicated in Fig. 4. Thereafter the thumb is released from the thumb piece to allow the spring to restore the closure plate. Thereafter, and without changing the position of the holder in the hand, the powder is spread over the tracing cloth by rubbing the pad member 12 flat over the powder and cloth. By reason of the fact that the said cushion or pad is flat and, therefore, parallel to the cloth and is of substantial area and is relatively solid, the powder is applied uniformly to the surface of the cloth so that ink lines thereafter applied to said surface will be uniform throughout.

le claim as our invention In a holder for an abrading and filling implement for tracing cloth the combination with a hollow body having a flat underface and a concaved upper handle portion, a pad secured to said underface, a perforated plate secured to and closing the end of said body, and terminating at its lower end in a forwardly projecting perforated lip, 'a second perfo-rated plate slidably V'mountedon the first named perforated plate, a stud depending from the slidably mounted plate, and projecting through the jive cents each, 'by addressing the Commissioner of Patents. Washington, 13.0. 

